Ok, cleaned everything up and measured again. I did the intake on 5 & 8, I got 1.957 and 1.943. I put on a steel retainer I had and got almost .exactly 030 less in both cases, so to Fast’s point it appears to be a difference in the retainer. In comparing to my original set-up I’m still .060-.070 out.

CEEF6E8A-D451-4539-B76D-699AC30C8BB1.jpegD03D08A0-B8E7-4CD3-B328-607DE2DDBF64.jpeg
Last edited by clovis; 02/27/21 07:23 PM.
'75 Plymouth Duster
Phase I 451 906/590/2-660 10.75/126
Phase II 451 Stage VI/590/1050 9.82/135
Phase III 383 906/Victor-Pump gas 11.30/119

"For by grace you have been saved through faith. And this is not your own doing; it is the gift of God,"